What 8.25 rear axle fits my 1964 Dodge Dart best?

That looks like a very good solution! Would you know a nice one for sale? What I also like is are the 25 spline (in which my axles would probably fit) and the 2.77:1 which give my car the nice 1800 rpm at 60 mph...
what years are we talking about and where should I look for one?
Not afraid to make a nice trip to GB... ;)